Under Structured Data, you’ll see the simulated event that results from applying the grok
pattern:

Any errors in the pattern will appear at the top of the page. For example,
here you see a parse exception because the pattern name is misspelled as WORDD
and therefore can’t be found in the pattern dictionary:

You can click the More link to see more detail about the message.

Click OK to dismiss the message and continue iterating over the grok pattern
until there are no errors and the output matches the event that you expect.